Clamp for ruling-pens



(Model.)

J. W. DIRHLD. CLAMP FOB RULIG BNs.

Patented Mar. 18, 1884.

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NiTnD STATES ATENT einen.

JOHN WILLIAM DIRHOLD, F ST. LOUIS, MISSOURI.

CLAMP FOR RULlNG-PENS.

SPECIFICATION forming part of Letters Patent No. 295,370, dated March 18, 1884.

Application filed May 18, 1853.

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Be it known that I, JOHN WILLIAM DIR- HOLD, ofSt. Louis, in the county of St. Louis and State of Missouri, have invented a new and usei'ul Improvement in Clamps for Ruling-Pens; and Ido hereby declare that the following is a full, clear, and exact description of the same.

The invention is an improvement in the class of ruling-machines in which thepenholders are moved laterally in parallel position by means of a system of levers connected by pivots, so as to form a lazytongs.

The invention consists in the'combinatiou and arrangement of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a plan view of the clamp, a portion of the body being broken out to show the arrangement of mechanism interiorly. Fig. 2 is avertical crossseotion of the same.

The body of the clamp is formed of two parts, A. A,which are chambered and secured together at the sides in such a manner that they are held separated at the front-edge, thus leaving a narrow space, a, through which the perrholders G project. Each of the latter is a thin slotted bar, and all are arranged parat lel to each other and at right angles to the longer axis of the clamp. Each holder C has a lug, n', which enters and slides in a slot, a2, formed in the inner side of the part A', and extending lengthwise thereof.

The system of levers B for adjusting the pen-holders C is arranged and connected after the manner of a lazy-tongs, and one end ofthe system is secured to the body of the clamp at Near the other end of the system is attached a long pin, that projects through a lateral slot, f, in the base A of the clamp, and has a knob or button, b', and also carries a pointer, y, which indicates on a scale, la., the extent of movement and position of the penholders C. Screws or pins d connect the levers B together, and also pass through and work in the slots of the pen-holders C, so that (Model.)

the latter are moved laterally together and held parallel during such movement. Metal plates E E are attached to the ends of the clamp, and hooks e e are connected therewith, those at one end being screw-threaded to permit adjustment. Wires e e', having loops at their ends, are engaged with the hooks ce, and extend across the levers B and holders C to support them within the chamber of the clamp, as shown in Fig. 2. Bands c serve to secure the pens c2 detachably to the ends of the holders C, that project through the groove o in the clamp.

The operation is as follows: When it is desired to move the pens e for the purpose of bringing them nearer together or moving them farther apart, the head b, carrying the pointer g, is moved in the groove f to a position opposite the proper pointin the scale h. By this action the system of levers B is actuated, in the manner well understood, to cause the holders" C to approach or recede from each other, according to the direction of the movement. As each holder projects through and moves in the guiding-groove a, it follows that all are held in the same longitudinal position. As each holder also engages `with two of the screws d of the levers, which are located upon opposite sides of a center line, it follows that a perfectly parallel movement is insured.

Having thus described my invention,whatI claim as new is- 1. The combination, with the hollow body of the clamp and the system of movable levers and pen-holders, of the wires e e', which are stretched taut and support said levers and holders, as shown and described.

2. In combina-tion with the body of the clamp, having grooves af and scale h, the system of levers B, with head b and pointer g, the slotted holders C, the screws d, and the securing-wires e e', as described.

JOHN VILLIAM DIRHOLD.

Witnesses:

J. WM. VosHoLL, THEODORE lnPrN. 

